Selective-etching of MOF toward hierarchical porous Mo-doped CoP/N-doped carbon nanosheet arrays for efficient hydrogen evolution at all pH values

Li, Yuanjian; Bao, Zhenan; Wang, Wenyu; Shi, Xiaojun; Zhang, Jin; Wang, Rui; He, Beibei; Wang, Qiang; Jiang, Jianjun; Gong, Yansheng; Wang, Huanwen

doi:10.1016/j.cej.2020.126981

Cited by 63 publications

(30 citation statements)

References 59 publications

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“…This observation suggests the activated OER/HER reaction dynamic for the outstanding catalytic activity of CoP@NP-CNS/CNT. [51] Furthermore, the CoP@NP-CNS/CNT also has a smaller solution resistance (R s , 4.1 Ω) than that of CoP@NP-CNS (5.7 Ω), emphasizing its enhanced electrical conductivity and charge transfer capability, [52][53][54] which is conducive to its enhanced electrochemical performance for OER and HER.…”

Section: Resultsmentioning

confidence: 99%

Metal‐Organic Frameworks Derived Multidimensional CoP/N, P‐Doped Carbon Architecture as an Efficient Electrocatalyst for Overall Water Splitting

Tian

Qin

et al. 2021

ChemCatChem

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Exploring highly efficient non-noble-metal-based electrocatalysts for water electrocatalysis is vitally important to meet the requirement for future hydrogen energy. In this work, we report a simple metal-organic-frameworks-based one-step calcination route to the rational design of a multidimensional bifunctional electrocatalyst, constituting 0D CoP nanocrystals embedded in N, P-doped binary carbon networks with 1D carbon hollow nanotube and 2D carbon porous nanosheet. The elaborate hierarchical architecture allows for high exposure of active sites and continuous electron/ion transport pathwaysf1.02. Together with the strong coupling effect between CoP and hybrid carbon matrices, the obtained electrocatalyst can efficiently catalyze both hydrogen and oxygen evolution reactions. Specifically, low overpotentials of 103 and 260 mV are needed to deliver H 2evolving current of 10 mA cm À 2 and O 2 -evolving current of 30 mA cm À 2 , respectively. Remarkably, an alkaline electrolyzer comprising this electrocatalyst drives 10 mA cm À 2 at a low cell voltage of 1.54 V, outperforming the integrated benchmarking Pt/C + IrO 2 couple, along with steady durability. The current work introduces a new way of developing innovative transition metal phosphides/carbon nanostructures for electrocatalysis and other energy-related applications.

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Section: Resultsmentioning

confidence: 99%

Metal‐Organic Frameworks Derived Multidimensional CoP/N, P‐Doped Carbon Architecture as an Efficient Electrocatalyst for Overall Water Splitting

Tian

Qin

et al. 2021

ChemCatChem

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“…Catalysts with structures containing interconnecting mesopores, smallsized mesopores, and presence of nanopores were also shown to benefit HER and OER in water electrolysis through more exposed active sites, enhance mass transport and charge transfer, plus easier diffusion and detachment of hydrogen and oxygen gas bubbles. [59][60][61][62] Therefore, it is clear that better catalyst porosity positively impacts the electrode activity; however, the stability of the porous structure and different characteristics of transition metals (ie, electron conductivity, adsorption energy) are still more crucial.…”

Section: Electrocatalytic Water Splitting In Aemwementioning

confidence: 99%

“…59,67,70 Other possible structures reported with positive impact toward catalytic activity are hierarchical and hollow structures (ie, hollow nanospheres). 58,60,71 Recently, Ashok et al 72 reported the advantage of a hierarchical structured Co/Co 9 S 8 /CNT nanowires with CNTs, synthesized using melamine-assisted pyrolysis. The hierarchical structure provided large exposed surface area and porosity that facilitate adsorption and desorption of reactants/products for both HER and OER in alkaline electrolysis (1 M KOH).…”

Section: Shape Of Catalystsmentioning

confidence: 99%

“…Other reports on hierarchical structured catalysts also suggested more exposed active sites, higher porosity, and forming interconnected networks for boosting ions and electron transport. 60,[73][74][75] Rougher surface morphology such as those demonstrated by nanoneedles and nanoflowerlike structures have also shown the increase in exposed active sites, greater surface area, and able to facilitate the electrolyte diffusion. 46,63,67,69 On the other hand, hollow-structured nanoparticles may facilitate bubble removal from the catalyst surface.…”

Section: Shape Of Catalystsmentioning

confidence: 99%

“…Co phosphide hybrids, such as the Co 2 P/Ni 2 P and Mo-doped CoP with N-doped carbon nanosheets, can afford low overpotential in 1 M KOH comparable to the Pt/C. 60,61 The addition of Co 3 S 4 to MoS 2 helps improve the HER capability of MoS 2 attributed to the synergistic effect between the two components to facilitate the charge transfer. 75 However, investigation of Co-based catalysts in the AEMWE cathode is still limited.…”

Section: Co-based Her Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Sulaiman

Wong

Loh

2021

Intl J of Energy Research

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Anion exchange membrane water electrolyzer (AEMWE) is a promising technology in water electrolysis for the production of green hydrogen. Unlike conventional alkaline water electrolyzers (AWE), AEMWEs utilize mild alkaline conditions and anion exchange membranes as separators and ionic conductors, respectively. However, the largest merit of AEMWE is the utilization of lowcost transition metals as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Achieving excellent AEMWE performance using highly active and robust transition metal electrocatalysts is desired for lowering the fabrication cost and realizing the successful commercialization of AEMWE. Water splitting efficiency in the AEMWE largely depends on the kinetics of the HER and OER catalysts. Such a condition requires proper understanding of the reaction mechanisms, careful design and optimization of catalyst materials, and maintenance of catalyst durability under AEMWE conditions during long-term operation. This review discussed recent transition metal HER, OER, and bifunctional water splitting electrocatalysts applied within the actual AEMWE membrane electrode assembly (MEA), where their influence toward the electrolyzer cell performance is highlighted. Additionally, the MEA fabrication methods are briefly addressed.From the review, potential electrocatalyst materials and remaining challenges are identified to provide for future improvements on the AEMWE system.

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Wet‐Chemistry: A Useful Tool for Deriving Metal–Organic Frameworks toward Supercapacitors and Secondary Batteries

Zhao

Zheng

Dai

et al. 2022

Adv Materials Inter

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Metal–organic frameworks (MOFs) possess the advantages of tailorable porosity, adjustable composition, and tunable topologies and are considered promising precursors and self‐templates for the synthesis of complex nanostructures as advanced electrode materials for energy storage. Among various strategies, wet‐chemical method endows better control over topological evolution and compositional transformation of MOF crystals. Herein, the authors comprehensively review the recent achievements on wet‐chemical derivation of MOF via etching, ion‐exchange, hydrolysis, and chemical transformation, underscore the corresponding mechanisms, and highlight their important applications in supercapacitors and secondary batteries.

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Selective-etching of MOF toward hierarchical porous Mo-doped CoP/N-doped carbon nanosheet arrays for efficient hydrogen evolution at all pH values

Cited by 63 publications

References 59 publications

Metal‐Organic Frameworks Derived Multidimensional CoP/N, P‐Doped Carbon Architecture as an Efficient Electrocatalyst for Overall Water Splitting

Metal‐Organic Frameworks Derived Multidimensional CoP/N, P‐Doped Carbon Architecture as an Efficient Electrocatalyst for Overall Water Splitting

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Wet‐Chemistry: A Useful Tool for Deriving Metal–Organic Frameworks toward Supercapacitors and Secondary Batteries

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